Memory management in allocating 2-D array

Question

I have allocated a two dimensional array using the following code:

// Dynamic allocation
        int **matrix=new int*[n];
        for(int i=0;i

        

Answer 1

"What is the correct way of doing it?"

Using standard containers like e.g. std::vector> or std::array,N> (supposed N is already known at compile time) is the correct way.
You don't use new()/new[] and delete/delete[] in 1st place (besides rare valid use cases).

If you're sure you have such case, you delete in exactly the reverse order as you were allocating using new[]. delete [][]; isn't valid syntax, as the compiler already told you.